CTT
CTT stands for:
- CTT Correios de Portugal (originally: Correios, Telégrafos e Telefones ), Portuguese postal company
- CTT Correios de Macau , Macau postal company of the former Portuguese colony
- Cervélo TestTeam , former Swiss cycling team ( UCI code)
- Classical test theory , Classical test theory in psychometrics
- Columbia TriStar Television , now Sony Pictures Television , a former American television studio
- ConcurTaskTree , a method for analyzing and modeling work processes in human-computer interaction (HCI)
- Tollerort container terminal , a facility from Hamburger Hafen und Logistik AG
- Courtney Taylor-Taylor , the lead singer of the American rock band The Dandy Warhols
- cusanus trägergesellschaft , a church health company, until 2009 Caritas carrier company Trier
- Custom Air Transport , IATA airline code for the US cargo carrier
- Cycling Time Trials , UK cycling time trial association